Window-ventilator.



0. & N. G. NELSON.

WINDOW VENTILATOR.

APPLICATION FILED FEB. 7. 191e.

Patented Feb. 11, 1919.

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OSCAR NELSON, 0F MINNEAPOLIS, AND NELS G. NELSON, OF ST. PAUL,MINNESOTA. I

WINDOW-VENTILATOR.

Specification of Letters Patent.

Patented Feb. 11, 1919.

Application filed February 7, 1916. Serial No. 76,587.

To all whom it may concern:

Be it known that we, OSCAR NELSON and NnLs G. NELSON, citizens of theUnited States, residing at Minneapolis, in the county of Hennepin andState of Minnesota, and St. Paul, in the county of Ramsey and State ofMinnesota, have invented a new and useful Improvement inWindow-Ventilators, of which the following is a specication.

This invention relates to improvements in window ventilators, and hasamong its objects the" production of an improvement, which is simple andinexpensive in construction, and which is adjustable, so that it can beused on windows of different sizes without constructing a large numberof various sizes.

A further object is to so construct the ventilator that the window canbe locked in open position, and that the ventilator can be easily foldedback without removal from the window casingwhen not in use. A ventilatorof this character is adapted for use for Ventilating purposes withoutallowing excessive draft or rain entering through an open window.

In the accompanying drawing forming part of this specification, Figure 1is an elevation of a detail of awindow casin and Window with ourinvention applic thereto; Figs. 2 and 3 are perspective views ofdetails; Fig. 4 is a section taken on the lline X-X of Fig. 1, and Fig.5 is an elevation of a detail showingan alternative construction of ourinvention. U

In the drawing A indicates a detail of Aa Window frameand B a detail ofa window, which'is slidable insaid frame. C indicates our improvedventilator which is applicable to window frames and windows of anyordinary type. This ventilator is made in two principal parts,consisting of the plates 2 and 3 slidably connected to move apart ortogether longitudinally by a slip joint made by a tongue and groove 4and 5 respectively in the plates 2 and 3, or vice versa, and by rollingthe lower edges of the plates at 6 and 7 freely around a longitudinalshaft 8, a gap being left in a portion of the roll 7 so as to permit theparts extending or sliding together.

In manufacturing our improved ventilator, the shaft 8 is made ofsufficient length to extend between the inner faces of a window frame ofanyl usual width, and said shaft is cut down to the proper length tocorrespond. The ends of this shaft are journaled in a pair of journalsupports 9 and 10, which are fastened by screws-11 or other suitablemeans against the adjacent sides of the frame in substantially verticalor operative position. The lates 2 and 3 are then extended sufficient yto occupy the spacebetween the journal supports 9 and 10, said supportsand said plates thus closing all of the space between the adjacent sidesof the frame. The lower edges of the plates rest closely adjacent thesurface of the window sill 12 and the upper edges of said plates areformed with shoulders 13 and flanges 14 for the lower edge of the windowsash B to rest against when the window sash is raised, and theventilator turned upwardly into substantially vertical or operativeposition for use. When in operative position the plates are locked tothe window sash by catches 15, which pre.- vent the sash from beingraised or lowered after the ventilator has been adjusted for use. Whenthe ventilator is turned back out of use and unlocked from thewindowfsash, the'latter can be closed in the usual manner.

rIthe plates 2 and 3 are formed with a plurality of Ventilating openings16, which are made by short straight substantially horizontal cutsthrough the metal and by forining or bending portions such as 18outwardly, thereby producing passages which are protected by shields toprevent rain passing through the ventilator.

Upon the inner surface of each of the plates 2 and 3 is a regulatingslide such as 19, each of the slides being formed with openings 20corresponding in position to register over the openings 16 through theplates. Each of these slides is. slidably secured to move longitudinallyon the corresponding plate member by means of pins 21 secured to theplate member and passing through slots 22 in the plate member. A knob 23on each of the slides facilitates regulating the slides to vary thesizes of the passages through the plates and slides.

In the construction described, the ventilator is shown applied to thelower portion of the window frame, whereas in the constructionillustrated in Fig. 5, the invention is shown when used at the upper endof the window frame. In the latter construction the ventilator swingsinwardly but upwardly instead of downwardly when out of use, the shaft 8being applied to the extreme upper end of the window frame. When theventilator is in use, its lower edge rests upon the window sash D, andis locked thereto in the same manner as in the preferred c0n-' the upperwindow sash instead of to theY lower, the shields 18 illustrated in Fig.2 are -reversed in position, so as to depend downwardly and protectagainst rain entering through the ventilator.- vWhile the openings 20 inthe slides are not formed with guards, yet, when desired, they may be ofsimilar form and construction as employed through the slides. A fastener23 may be used when desired for fastening the shaft 8 tothe window sillor the top of the window casing to more firmly hold the ventilator inplace. v

In accordance with the patent statutes, we have described the principlesof operation of our invention, together with the apparatus which we nowconsider to represent the best embodiment thereof, but we desire tomeente have it understood that the construction` shown is onlyillustrative, and that the invention can be carried out by other ymeansand applied to uses other than those above set forth within the scope ofthe following claim. y

Having described our invention, what we claim as new and desireto-protect by Letters Patent is f A ventilator for a window frame and asliding sash therein, comprising, in combination, a plate elementadapted to assume an upright position between said frame and f said sashwhen the latter is in open position,

a pintle connection between said plate ele-- ment' and said frame bywhich said plate element may; be swung away from said sash to permit t esash-closing, means for locking the free end of said plate member tosaid sash when the sashis in open position and a ledge formed on saidplate member upon which the sash may be seated when the latter is openand when the plate element is in upright position. y

In testimony whereof, we have signed our names to this specification.

OSCAR NELSON. NELS G. NELSGN.

